CVE-2023-40428

Sensitive data disclosure via mishandled caches

Published Sep 26, 2023 · Updated Nov 4, 2025

Information disclosure in Siri in Apple iOS and iPadOS before 17 allows local users to access sensitive user data through an app. Siri mishandles cached data, allowing an app to retrieve sensitive information that should not remain accessible; Apple has not disclosed the cache object, API, or stale-data path involved. Exploitation requires a user to run or interact with a local app; the documented consequence is data disclosure only.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Siri in Apple iOS and iPadOS before 17 allows local users to access sensitive user data through an app. Siri mishandles cached data, allowing an app to retrieve sensitive information that should not remain accessible; Apple has not disclosed the cache object, API, or stale-data path involved. Exploitation requires a user to run or interact with a local app; the documented consequence is data disclosure only.

The record

CVE
CVE-2023-40428
Published
Sep 26, 2023
Updated
Nov 4, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
T1005
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <17

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <17

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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